President Donald Trump, first lady Melania Trump and their son Barron Trump arrive at the White House June 11, 2017. (Photo by Chris Kleponis-Pool/Getty Images)

President Donald Trump, first lady Melania Trump and their son Barron Trump arrive at the White House June 11, 2017. (Photo by Chris Kleponis-Pool/Getty Images)

First Lady Melania Trump and son Barron officially moved into the White House on Sunday.

President Donald Trump exited Marine One on Sunday with his family and led his wife to her new abode as Barron, donning a T-shirt with the words “The Expert,” walked slightly ahead of his parents.

The first lady said in a tweet that she’s “looking forward to the memories we’ll make” in the presidential mansion.

In November, the Trumps said Melania and Barron would not move into the White House immediately after the inauguration, so the 11-year-old could finish up his school year in New York City. After rumors swirled that the two would remain in Manhattan indefinitely, the family confirmed that they would move into 1600 Penn come summer.

The Washington Post reported after the election that her decision to delay her move appears to be unprecedented as nearly every first lady has lived in the White House, except Martha Washington because it wasn’t built yet, and Anna Harrison, whose husband, President William Henry Harrison, died one month after being sworn in.

It has cost the New York Police Department between $127,000 and $146,000 per day to guard the Trump Tower while Mrs. Trump and Barron remained in New York.

Barron, the first boy to live in the presidential mansion since 1963, will be attending St. Andrew’s Episcopal School in Potomac, Maryland this fall.

President Trump’s daughter Tiffany is also coming to Washington to study law at Georgetown this fall. His other daughter, Ivanka, who works as an adviser in the White House, has settled in Kalorama with her family.

Politico reported last week that the first lady’s parents will be showing up in the District more to help care for Barron, but they won’t be moving into the presidential mansion. White House sources told Politico that they hoped the First Lady could help temper her husband.

Traditionally, presidential spouses choose an issue to focus on during their time at the White House. While the first lady has yet to choose an initiative, “there’ll be more pressure for her to be working on something that’s her own” now that she’s in Washington, Jean Harris, professor of political science and women’s studies at the University of Scranton in Pennsylvania, told the Associated Press.

NBC News has footage of the Mrs. Trump and Barron’s arrival on Sunday.

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